Tap-filter.



W. J. OCONNOR. TAP FILTER.

APPLICATION FILED mama, 1912.

1,078,370, Patented Nov. 11, 1913.

' WITNESSES: l/VVEIUOR BY Wm, M

I in section on line 2 of -1.

V UNITED STATES PATENT OFFICE.

WILLIAM J. oconivon, or new YORK, N.

TAP-FILTER.

Specification of Letters Patent.

Patented Nov. 11, 1913.

Application filed August 113, 1912. Serial No. 714,778.

State of New York, have invented certain new and useful Improvements inTap-File ters, fully described and represented in the,

following specification and the accompanying drawings, forming a part ofthe same.

This invention relates to filters for filter-1 ing water or otherliquids, and more espe-j cially to water filters intended to be screwed?or otherwise attached to service faucets or c ks The invention aims toprovide a filter of this kind suitablefor general household or other usewhich shall be so constructed that the cloth or other filtering materialmay be readily placed in position andrenewed from time to time, andwhich shall be simple and inexpensive in construction and eilicient inoperation.

Acl'ull understand ing oi the invention cant best be given by a detaileddescription of a1 filter made to embody the invention in an approvedform, and such a description will now be given in connection with theaccom-- panying drawings,in which Figure 1 is a view of such a filterpartly in elevation and partly .in central. longitudi section; and Fig..2 is a plan viewpartly Referring to the drawings, the body or casing ofthe filter as shown is ottcylindri-i calform with reduced ends providingthe inlet and outlet openings, and is made up of two separable sections10 and11,the upper section 10 being formed with a reduced up per endarranged to be screwed or otherwise attached to a water faucet, as bybeing pro-Q vided with an interiorly threaded socket piece or neck 12set into the end of the cast ing section, and the lower section 11 beingformed with a reducedlower end having a discharge opening 13. The casingsections may be formed in any suitable mannerjandj of any suitablematerial, but they are best made of comparatively thin sheet copper orbrass or other suitable metal spun or otherwise shaped to the desiredform; and the sections are madeto telescope together, the lower portionof the upper section 10 fitting tightly within the open upper end of thelower section 11 to make a substantially water-tight joint. Thisarrangement provides a simple way of securing the sections together sothat the parts may be readily separated and assembled; and by formingthe section so as to overlap a considerable distance and to fit tightlytogether they will be held together by friction against any ordinarywater pressure.

The filter shown is intended for using cloth or other suitable sheetfiltering material. The filtering material is supported by an annularsupport 15 which will usually be made of comparatively thin metal and isremovable from the casing for the purpose of removing and replacing thefiltering materialthereon; and the filtering material is placed andsecured in position on the support bybeing placed over the upper edge ofthe support and drawn down and clamped against the sides of the supportby an annular holding band or ring 16, as indicated by the dotted line ain Fig. 1. The support when in position rests onand is supported by thelower casing section 11 and extends upward when the casing sections areclosed together into the upper section 10 and past an annular shoulder17 projecting inwardly from the wall of the casing section 10, thisshoulder being formed when the casing section is of sheet metal by aninward band .or a foldof the metal as shown in Fig. 1. The support 15should best be 01' upwardly and inwardly tapering form with, preferably,a somewhat sharper incline or taper near its upper edge, and is of suchsize or diameter thatwhen the parts are assembled the shoulder 17 willpress against thefiltering material drawn down over the inclined side ofthe support to form a sub- Stantially water-tight joint between the wallof the casingsection 10 or shoulder 17 and the support 15. In order thatthe filtering material stretched over the open upper end of the support15 may be held as fiat as possible so as to secure the best filteringaction, the support is providedat its upper to pull off the lower casingsection, remove the support 15, renew the filtering material thereon,and replace the support and close the casing sections together; and thismay be done if desired without removing the upper casing section fromthe faucet.

It will be not-iced that the layer or diaphragm of filtering material issupported in. position to divide the interior of the.

casing in a plane above the joint between the casing sections into aninlet chamber and an outlet chamber, and that, therefore, the water doesnot tend to escape through the joint between the sections under the inlet pressure, but that it is only water in the outlet chamber or waterunder no or practically no pressure which can reach the joint. Therewill be little if any tendency, therefore, for water to escape throughthe joint, and, furthermore. any water which might escape through thejoint will be filtered water. Since the cloth around the sides of thesupport 15 is pressed tight against the support by the shoulder 17, anywater which might pass between the shoulder and the support will be justas thoroughly filtered as that passing through the filtering materialstretched over the top of the support. The bottom edge of the supportwill not make such a tight fit with the casing section 11 as to preventthe passage of any water which might leak past the shoulder 17. If founddesirable, special openings might be provided for the passage of anysuch water from the space between the support and the wall of thecasing. It should be noted, also, that when the parts of the casing areforced together the shoulder 17, as the upper part of the support isforced upward past and against the shoulder, will act to draw thematerial more tightly over the support and then hold it by clamping itagainst the sides of the support, and will also aid in sustaining thesupport.

It will be understood that the invention is not to be limited to theexact construction and arrangement of the parts shown, but that itincludes changes and modifications thereof within the claims. It will beunderstood, also, that although the filter will usually be used in avertical position with the filtering diaphragm standing horizontal, thisbeing considered at the present time the best position for use, yet thefilter might be used in other positions, and the expressions uppercasing section and lower casing section and other similar expressionsused herein are not to be considered as limiting the constructionclaimed to a vertically arranged filter or one intended to be used invertical position.

hat is claimed is:

1. A filter comprising in combination a casing formed of upper and lowerseparable telescoping sections of sheet metal, the upper section havingan inlet formed by a threaded socket piece and the lower section havingan outlet opening, a support for filtering material formed of sheetmetal and having upwardly and inwardly tapering side wall and open endsand adapted to rest within and against the lower casing section and toextend upward within the upper casing section and having means at its upper end for sustaining the filtering material, and a holding band formedto slip over the support to hold a sheet of filtering material stretchedover the upper edge of the support, the upper casing section beingformed to engage the filtering material on the support to make asubstantially water-tight joint between the supportand'the side of theupper casing section.

2. A filter comprising in combination a casing having a separable lowerportion, a support for filtering material open at its upper end andextending upward from the lower portion of the casing, and an inwardlyextending shoulder on the casing wall in posi' tion to engage sheetfiltering material extending over the top of the support and about thesides thereof when the casing is closed and the support pressed upwardin the casing to stretch the filtering material over the top of thesupport and hold it against the sides of the support and to make asubstantially water-tight joint between the support and the casing.

In testimony whereof, I have hereunto set my hand in the presence of twosubscribing witnesses.

WILLIAM J. OCONNOR.

Witnesses:

A. L. KENT, D. A. DAVIES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

